 | 1834 - 536 Seiten
...1 purpose of keeping the working-shafts free from water. The object of these perpendicular shafts, is not so much to get at the ores which are directly...into a state capable of being worked by a number of men ; in short, to make it what is termed a mine. It is evident, that the shafts and galleries divide... | |
 | Luke Hebert - 1835 - 938 Seiten
...the purpose of keeping the working shafts free from water. The object of these perpendicular shafts is not so much to get at the ores, which are directly...into a state capable of being worked by a number of men ; in short, to make what is termed a mine. It is evident that the shafts and galleries divide the... | |
 | Luke Hebert - 1836 - 942 Seiten
...(he purpose of keeping the working shafts free from water. The object of these perpendicular shafts is not so much to get at the ores, which are directly...into a state capable of being worked by a number of men ; in short, to make what is termed a mine. It is evident that the shafts and galleries divide the... | |
 | Joseph Yelloly Watson - 1843 - 106 Seiten
...seem to authorise the expense, the mine is commenced in the manner before explained. The object of perpendicular shafts, and horizontal galleries, is...into a state capable of being worked by a number of men— in short to covert it into what may now be termed a mine. In the Cornish mines, the sinking... | |
 | Luke Hebert - 1849 - 944 Seiten
...the purpose of keeping the working shafts free from water. The object of these perpendicular shafts is not so much to get at the ores, which are directly...into a state capable of being worked by a number of men ; in short, to make what is termed a mine. It is evident that the shafts and gallerie« divide... | |
 | John R. Leifchild - 1855 - 340 Seiten
...The purpose of these exc* vations is not so much to get immediately at the ores which a« produced from them, as to put the lode into a state capable of being worked by a number of men, who are now to take the "piti Before I mention their work, let us examine their tools. ————^__'... | |
 | Sir Francis Bond Head - 1857 - 384 Seiten
...the same distance—sixty feet, or ten fathoms—is driven a third, and then a fourth gallery;—and so on to any depth. The object of these perpendicular...number of men,—in short, to convert it into what may uow be termed a mine; for it will be evident that the shafts and galleries divide the lode into solid... | |
 | John Murray (Firm) - 1882 - 298 Seiten
...;—and so on to any depth. " The object of these perpendicular shafts and horizontal galleries is v fiot so much to get at the ores which are directly procured...into a state capable of being worked by a number of mei_—in short, to convert it into what may now be termed a mine— for iv will be evident that the... | |
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so on to any depth. The object of these perpendicular shafts, and horizontal galleries, is not so much to get at the ores which are directly procured from them, as to put the lode into a state capable of being worked by a number of men,—in short, to... 